Find total size of the hard disk

Hi,
Can anyone please tell me how to find the total hard disk size using C in DOS environment. The hard disk might not be formatted.

Thanks for the help...
Aju

 

Thanks for the reply Shabbir,

But the function that you have told is a win32 API, right?
That will not work in DOS mode. I mean in DOS OS.
I was looking for something that will work under DOS mode, some solution in C or even in assembly language.

Thanks